var speed=5
        demo2.innerHTML=demo1.innerHTML
        function Marquee(){
        if(demo2.offsetWidth-demo.scrollLeft<=0)
        demo.scrollLeft-=demo1.offsetWidth
        else{
        demo.scrollLeft++
        }
        }
        var MyMar=setInterval(Marquee,speed)
demo.onmouseover=function() {clearInterval(MyMar)}
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}